21133111002 has 8 divisors (see below), whose sum is σ = 42266222016. Its totient is φ = 7044370332.

The previous prime is 21133110949. The next prime is 21133111007. The reversal of 21133111002 is 20011133112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21133111002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21133111007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761092578 + ... + 1761092589.

It is an arithmetic number, because the mean of its divisors is an integer number (5283277752).

Almost surely, 2^21133111002 is an apocalyptic number.

21133111002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133111002 is a wasteful number, since it uses less digits than its factorization.

21133111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522185172.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21133111002 its reverse (20011133112), we get a palindrome (41144244114).

The spelling of 21133111002 in words is "twenty-one billion, one hundred thirty-three million, one hundred eleven thousand, two".